Print the contents of the miscellaneous (MISC) register to the console if
it is valid along with the other register values when a machine check is
encountered.
When running as a guest operating system, the FreeBSD kernel must assume
that the virtual machine monitor has enabled machine check exceptions.
Unfortunately, on AMD Family 10h processors the machine check hardware
has a bug (Erratum 383) that can result in a false machine check exception
when a superpage promotion occurs. Thus, I am disabling superpage
promotion when the FreeBSD kernel is running as a guest operating system
on an AMD Family 10h processor.
framebuffer driver, etc. work on FreeBSD/amd64.
A significant amount of improvements were done by jkim@ during the recent
months to make vesa(4) work better, over the initial code import. This
work is based on OpenBSD's x86emu implementation and contributed by
paradox <ddkprog yahoo com> and swell.k at gmail com.
Hopefully I have stolen all their work to 8-STABLE :)
All bugs in this commit are mine, as usual.
Replace the static NGROUPS=NGROUPS_MAX+1=1024 with a dynamic
kern.ngroups+1. kern.ngroups can range from NGROUPS_MAX=1023 to
somewhere in the neighborhood of INT_MAX/4 one a system with sufficent
RAM and memory bandwidth. Given that the Windows group limit is
1024, this range should be sufficient for most applications
r202342:
Only allocate the space we need before calling kern_getgroups instead
of allocating what ever the user asks for up to "ngroups_max + 1". On
systems with large values of kern.ngroups this will be more efficient.
The now redundant check that the array is large enough in
kern_getgroups() is deliberate to allow this change to be merged to
stable/8 without breaking potential third party consumers of the API.
Optimize pmap_demote_pde() by using the new KPTmap to access a kernel
page table page instead of creating a temporary mapping to it.
Set the PG_G bit on the page table entries that implement the KPTmap.
Locore initializes the unused portions of the NKPT kernel page table
pages that it allocates to zero. So, pmap_bootstrap() needn't zero
the page table entries referenced by CMAP1 and CMAP3.
Simplify pmap_set_pg().
For i386, amd64 and ia32 on amd64 MD syscall(), reread syscall number
and arguments after ptracestop(), if debugger modified anything in the
process environment.
Add a facility for associating optional descriptions with active interrupt
handlers. This is primarily intended as a way to allow devices that use
multiple interrupts (e.g. MSI) to meaningfully distinguish the various
interrupt handlers.
- Add a new BUS_DESCRIBE_INTR() method to the bus interface to associate
a description with an active interrupt handler setup by BUS_SETUP_INTR.
It has a default method (bus_generic_describe_intr()) which simply passes
the request up to the parent device.
- Add a bus_describe_intr() wrapper around BUS_DESCRIBE_INTR() that supports
printf(9) style formatting using var args.
- Reserve MAXCOMLEN bytes in the intr_handler structure to hold the name of
an interrupt handler and copy the name passed to intr_event_add_handler()
into that buffer instead of just saving the pointer to the name.
- Add a new intr_event_describe_handler() which appends a description string
to an interrupt handler's name.
- Implement support for interrupt descriptions on amd64, i386, and sparc64 by
having the nexus(4) driver supply a custom bus_describe_intr method that
invokes a new intr_describe() MD routine which in turn looks up the
associated interrupt event and invokes intr_event_describe_handler().
Use kern_sigprocmask() instead of direct manipulation of td_sigmask to
reschedule newly blocked signals.
MFC r198590:
Trapsignal() calls kern_sigprocmask() when delivering catched signal
with proc lock held.
MFC r198670:
For trapsignal() and postsig(), kern_sigprocmask() is called with
both process lock and curproc->p_sigacts->ps_mtx locked. Prevent lock
recursion on ps_mtx in reschedule_signals().
Make sure that the primary native brandinfo always gets added
first and the native ia32 compat as middle (before other things).
o(ld)brandinfo as well as third party like linux, kfreebsd, etc.
stays on SI_ORDER_ANY coming last.
The reason for this is only to make sure that even in case we would
overflow the MAX_BRANDS sized array, the native FreeBSD brandinfo
would still be there and the system would be operational.
Reviewed by: kib
lindev(4) [1] is supposed to be a collection of linux-specific pseudo
devices that we also support, just not by default (thus only LINT or
module builds by default).
While currently there is only "/dev/full" [2], we are planning to see more
in the future. We may decide to change the module/dependency logic in the
future should the list grow too long.
This is not part of linux.ko as also non-linux binaries like kFreeBSD
userland or ports can make use of this as well.
Suggested by: rwatson [1] (name)
Submitted by: ed [2]
Discussed with: markm, ed, rwatson, kib (weeks ago)
Reviewed by: rwatson, brueffer (prev. version)
PR: kern/68961
Core2Duo/Core2Quad CPUs are unable to control frequency of single CPU
core, only pair of them. As result, both cores are running on highest
one of requested frequencies, and that is reported by status register.
Such behavior confuses frequency validation logic, as it runs on only
one core, as SMP is not yet launched, making EIST completely unusable.
Disable frequency validation by default, for systems with more then one
CPU, until we can implement it properly. It looks like making more harm
now then benefits. Add 'hw.est.strict' loader tunable to control it.
PR: amd64/140506
- Add hw.clflush_disable loader tunable to avoid panic (trap 9) at
map_invalidate_cache_range() even if CPU is not Intel.
- This tunable can be set to -1 (default), 0 and 1. -1 is same as
current behavior, which automatically disable CLFLUSH on Intel CPUs
without CPUID_SS (should be occured on Xen only). You can specify 1
when this panic happened on non-Intel CPUs (such as AMD's). Because
disabling CLFLUSH may reduce performance, you can try with setting 0
on Intel CPUs without SS to use CLFLUSH feature.
- Amd64 init_secondary() calls initializecpu() while curthread is
still not properly set up. r199067 added the call to
TUNABLE_INT_FETCH() to initializecpu() that results in hang because
AP are started when kernel environment is already dynamic and thus
needs to acquire mutex, that is too early in AP start sequence to
work.
Extract the code that should be executed only once, because it sets
up global variables, from initializecpu() to initializecpucache(),
and call the later only from hammer_time() executed on BSP. Now,
TUNABLE_INT_FETCH() is done only once at BSP at the early boot
stage.
There are known issues with this driver that are beyond what can be
fixed for 8.0-RELEASE and the bugs can cause boot failure on some systems.
It's not clear if it impacts all systems and there is interest in getting
the problem fixed so for now just comment it out instead of remove it.
Commit straight to stable/8, this is an 8.0-RELEASE issue. Head was left
alone so work on it can continue there.
Reviewed by: Primary misc. architecture maintainers (marcel, marius)
Consolidate CPUID to CPU family/model macros for amd64 and i386 to reduce
unnecessary #ifdef's for shared code between them.
This MFC should unbreak the kernel build breakage introduced by
r198977.
Reported by: kib
Pointy hat to: me
Opteron rev E family of processor expose a bug where acq memory barriers
can be broken, resulting in random breakages.
Printout a warning message if affecred family and model are found.
Fix some problems with effective mmap() offsets > 32 bits. This was
partially fixed on amd64 earlier. Rather than forcing linux_mmap_common()
to use a 32-bit offset, have it accept a 64-bit file offset. This offset
is then passed to the real mmap() call. Rather than inventing a structure
to hold the normal linux_mmap args that has a 64-bit offset, just pass
each of the arguments individually to linux_mmap_common() since that more
closes matches the existing style of various kern_foo() functions.
Extract the code to find and map the MADT ACPI table during early kernel
startup and genericize it so it can be reused to map other tables as well:
- Add a routine to walk a list of ACPI subtables such as those used in the
APIC and SRAT tables in the MI acpi(4) driver.
- Move the routines for mapping and unmapping an ACPI table as well as
mapping the RSDT or XSDT and searching for a table with a given signature
out into acpica_machdep.c for both amd64 and i386.
Define architectural load bases for PIE binaries.
MFC r198203 (by marius):
Change load base for sparc to match default gcc memory layout model.
Approved by: re (kensmith)
Per their definition, atomic instructions used in conjuction with
memory barriers should also ensure that the compiler doesn't reorder paths
where they are used. GCC, however, does that aggressively, even in
presence of volatile operands. The most reliable way GCC offers for avoid
instructions reordering is clobbering "memory".
Not all our memory barriers, right now, clobber memory for GCC-like
compilers.
Fix these cases.
Approved by: re (kib)
As a workaround, for Intel CPUs, do not use CLFLUSH in
pmap_invalidate_cache_range() when self-snoop is apparently not reported
in cpu features.
Approved by: re (bz, kensmith)
- Split the logic to parse an SMAP entry out into a separate function on
amd64 similar to i386. This fixes a bug on amd64 where overlapping
entries would not cause the SMAP parsing to stop.
- Change the SMAP parsing code to do a sorted insertion into physmap[]
instead of an append to support systems with out-of-order SMAP entries.
Approved by: re (kib)
for stable branches:
- shift to MALLOC_PRODUCTION
- turn off automatic crash dumps
- Remove kernel debuggers, INVARIANTS*[1], WITNESS* from
GENERIC kernel config files[2]
[1] INVARIANTS* left on for ia64 by request marcel
[2] sun4v was left as-is
Reviewed by: marcel, kib
Approved by: re (implicit)
